(a) Verify that y1(x) = ex is a solution of
xy '' − (x + 10)y’ + 10y = 0.
(b) Use (5) to find a second solution y2(x). Use a CAS to carry out the required integration.
(c) Explain, using Corollary (a) of Theorem 3.1.2, why the second solution can be written compactly as
Reference:
Theorem 3.1.2: Superposition Principle—Homogeneous Equations
Let y1, y2,. . ., yk be solutions of the homogeneous nth-order differential equation (6) on an interval I. Then the linear combination
y = c1 y1(x) + c2 y2(x) + . . . + ck yk(x),
where the ci, i = 1, 2, . . . , k are arbitrary constants, is also a solution on the interval.
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